Split ring fitting machine



July 17, 1934. Q STORER 1,966,744

SPLIT RING FITTING MACHINE Filed June 15, 1952 2 Sheets-Sheet l itb:1 I-"T- A TTOR NE V July 17, 1934. c. E. STORER SPLIT RING FITTING MACHINE2 Sheets-Sheet 2 Filed June 13, 1932 F/JZNVENTOR y W zl .4 TTOR/VEV Bi M1 Patented July 17, 1934 UNITED fiTATES new oi'rics 4 Claims.

This invention relates to new and useful improvements in split ringfitting machines.

It is the principal object of my invention to provide a simple, compactand efiicient device for filing the adjacent free ends of a split ring,such as a piston ring, to make their faces parallel. The device in itsdifferent forms is adjustable to accommodate different sized rings, andmay be clamped to a bench, or mounted in a vise, for convenientoperation. The clamp bar also has graduations on its face to center thevarious size rings over the cutter.

It is another object of my invention to provide means for adjusting thedevice to produce square or diagonal cuts on the split ring.

Other important and incidental objects will be brought out in thefollowing specification and particularly set forth in the subjoinedclaims.

In the accompanying drawings illustrating the different forms ofembodiment of my device, Figure 1 is a side View of one type of it.showing the ring to be filed in a vertical position. Figure 2 is an endview thereof. Figure 3 is a top view of the same. Figure l is a planview of the base block showing the locking holes. Figure 5 shows viewsof the various type of ring joints to be filed by my device. Figure 6 isa top plan view of another form of my filing device. Figure 7 is a sideview of the latter. Figure 8 is a top View of one of the gage clamps.

Figure 9 is an end view of the gage clamp shown at Figure 8. Figure 10is-a top view of another type wherein the ring is clamped to the face ofthe device in a horizontal position. Figure 11 is an end view of thedevice shown at Figure 10. And Figure 12 is an end view of the sameshowing the filingdiscadjusted to an angularposition.

Referring to Figures 1. to 5 inclusive, illustrating one form ofembodiment of my invention, the numeral 1 designates a base block formedwith a bottom hole to receive the upper end of a supporting. rod 2having .a right-angled bottom portion 3. This rod, which is secured tothe block 1 by a stud 4,has in its end 3 a vertical screw hole toreceive the threaded upper end of an angle clamp 5 by which the baseblock may be clamped to a bench.

Formed in the upper part'of the base block 1 is a transverse hole toreceive a shaft 6. Secured to the inner end of the latter is a hub '7which is: rotatable within a bearing recess provided in the inner faceof'the block I. Secured to thishub' by a, stud '8 and washer 9 is a discfile 10' having a' cutting surface on each side. To the other end oftheshaft 6 there is'secured, beyond a sleeve 11 surrounding theshaitftheinverted U-shaped end 12 of a handle 13. The latter is firmly secured tothe shaft by a stud 14 which passes downwardly through a hole in thehorizontal part of the U- portion of the handle, to engage in a recessedpart of the shaft. A look nut 15 is applied to the stud 66 between theshaft and said horizontal part of the handle.

Adapted to be applied to the top surface of the block 1 is a channel,clamp block 16 formed in its lower surface with a quadrant shaped slot17 to 55 receive the projecting part of the filing disc 10 in itsdiiferent adjusted positions.

The channel clamp block 16 is adapted to receive a graduated clamp bar18 which is laterally adjusted within it by a set screw 19 to firmly 70.clamp the split end of a ring 20 against the outer wall of the channel.Thebottom of the channel block 16 is beveled from each end down to theedges of the quadrantashaped slot 1'7 to support a split ring in aposition to present its adjacent free ends to the filing disc 10 whichprojects into the slot.

The split ring to be filed is properly centered in the clamp block 16 bytwo gage seats 21 and 22. These gage seats consist of vertical platesformed with longitudinal slots 23 and top flanges 24 that are free totravel over the top surface of the channel block 16. Projecting inwardlyfrom the top flange on each gage seat, over the graduated end of theclamp bar 18 is an indicating '5 finger 25 formed with a beveled inneredge to engage the split ring inserted in the channel block and providean adjustable seat for it. The graduations on the ends of the clamp barwill deter mine the position of the gage seats 21 and 22 to 0accommodate the size of ring to be filed, said seats being held in theiradjusted positions by set screws 26 which are inserted through the slots23 in them.

When clamped in the block 16 as above de- 9 scribed, the split. ring, inthisinstance the ring 20, may have its free ends filed by turning thedisc 10 through the handle 13, to provide parallel faces on said ends. V

The device is constructed to produce any one of the cuts shown in Figure5, by mounting the clamp block 16 at the desired angle upon the baseblock 1. For this purpose, the base block is formed with a plurality oflarge holes 27 and small holes 28. The small holes are in pairs toreceive two pins 29 that project downwardly from the bottom of the clampblock 16,'to-;hold the latter in an adjusted position, being assisted bya 'set' screw 30 which is passed downwardly through one of two holes insaid clampblock into a large hole 2'7 in the base block. The straightjoint 31 in the ring 20 is produced when the clamp block 16 is securedto the base block 1 at a right angle, while the oblique cuts 32 and 33are produced when the clamp block is secured at an acute angle to thebase block.

Referring now to Figures 6 to 9, inclusive, I have shown anotherembodiment of my invention, the numeral 34 indicating a circular headhaving a square depending shank 35 bywhich the device may be mounted ina vise or other suitable bracket.

The head 34 is provided with a center oblong aperture 36 extendingdownwardly through the shank. Extending laterally from the aperture 36through the periphery of the head and parallel with its top face 3'7, isa hole to receive a shaft 38. Where this shaft projects into theaperture 36, it is shouldered to receive a double faced filing disc 39,like the disc file 10, and secured in place by hex nuts 40, 40.

Beyond the periphery of the head the extended end of the shaft 38 isthreaded to receive check nuts 41, 41, by which the shaft may beadjusted axially to gage the end play. Also, to the outer end of thisshaft a handle 42, similar to the bandle 13, is applied.

The top face 3'7 of the head is provided with a series of equally spacedholes 43 adapted to receive therein depending dowel pins 44, 44 in thebottom surface of a clamp block 45, that is mounted on the head. Bymeans of these pins and the spaced holes, the clamp block 45 in whichthe rings are held, may be positioned inaxial alinement with the shaft38, or obliquely positioned thereto, as shown by the dotted lines atFigure 6, to file the ring joints shown in Figure 5.

This clamp block 45 is similar to the channel clamp 16 and is providedin its lower face, at its center, with oppositely disposed quadrantslots 46, 46 that receive therein the projecting filing disc 39 in itsvarious adjusted positions.

The top surface of the clamp block 45 has a wide longitudinal channel4'7 that is adapted to receive therein a graduated clamp bar 4'7 whichis laterally adjusted by a thumb screw 48 to firmly clamp a split ring20 between it and the opposite wall of the channel. One side of thechannel, adjacent the wall opposite the clamp, has therein a narrowaccurate ledge 49 to gage the depth to which the ring 20 may beinserted.

In order that the ring may be properly centered over the filing disc 39,I have provided on the top face of the clamp block 45 adjustable gages50 and 51 that co-act with the ledge 49, the ring engaging the latterand the adjacent beveled faces 52, 53 of the gages 50, 51, respectively.

These gages consist of fiat L shaped plates, oppositely disposed asshown at Figure 8, and having in their alined legs 54 and 55, elongatedslots 56 and 57 that reecive therethrough thumb screws 58 and 58. Thesescrews are received by threaded holes in the top face of the clamp block45 and permit an adjustment of the clamps, coextensive the slots 56 and5'7.

The beveled faces 52, 53 of the gages extend over the face of the clampbar in registry with graduations 59 thereon, whereby when these beveeled faces are alined with like numbers on each side the clamp blockwillproperly receive therein a certain size ring that will also beproperly centered over the disc file. When the shaft 6 is rotated theadjacent faces of the ring 20 will be filed in true parallelism toprovide a perfect seal when placed in use.

When it is desired to insert a larger or smaller diameter ring 20 in theclamp, these gages are either further separated or moved closertogether.

In Figures 10, 11 and 12 I have shown still another embodiment of myinvention, wherein the split rings are held in a fiat or horizontalposition. Referring now to the above figures, the numeral 59 designatesa fiat base plate having a depending shank 60 by which the device may bemounted in a vise or bracket (not shown). The base plate 59 issubstantially square, and has in one corner thereof a recess 61. Thisrecess forms between it and the side of the plate a leg 62.

Positioned in the recess 61 is a swivel block 63 that is rotatable abouta threaded stud 64, received therein. This stud extends outwardlythrough a recess 65 in the leg 62 and through an axial hole 66 in anadjusting block 6'7. Beyond the block 6'7 the stud terminates in anenlarged head 68 that receives therethrough a pin 69 by which the studmay be turned.

The block 63 as shown in Figure 10 is substantially L shaped, andreceives in a lateral hole through it, a shaft '70. This shaft projectsinto the recess 61 and has mounted on its threaded shouldered end '71 adouble faced filing disc '72, similar to the filing disc 39, and securedto the shaft by a nut 73 and washer '74. To the outer projecting end ofthe shaft a handle '75, similar to the handle 42, is attached by whichthe filing disc may be rotated. Lock nuts 75 are provided to gage theend play of the latter.

The adjusting block 67 has parallel sides '76, '76 that are received bya shallow recess in the outer face of the leg 62 to which it is securedby screws 7'7, 7'7, extending through elongated slots '78, '78 in theblock 67.

Between the screws '77, '7'7, and below the stud 64, is a wing screw 79that also passes through another elongated slot 80 and is received by athreaded hole in the leg 62. When the wing screw '79 is loosened, theblock 6'7 may be adjusted vertically, carrying the swivel block 63 andfiling disc 72 with it.

Where the filing disc '72 projects into the recess 61, it enters alateral recess 81 opposite the side of the leg 62. Below the surface ofthe plate the sides 81 of the recess 81 are beveled outwardly at anoblique angle as shown at Figure 11. Now, when it is desired to file theends of a split ring at the oblique cuts 32 and 33 shown in Figure 5,the wing screw '79 is loosened and the block 6'7 is raised and againheld in place by tightening the wing screw. (See Figure 12). The stud 64is loosened to permit adjustment of the swivel block and disc file toeither of the obliquely inclined positions as shown at Figure 12.

The split ring 20 to be filed is placed upon the plate 59 as shown inFigure 10, with its free ends against the opposite faces of the filingdisc '72. In'this position the ring 20 engages two oppositely disposedstop pins 82, 83 in the top of the plate and at each side of the recess81.

The step-cut joint 31 may also be filed by this device by first filingone side of the cut and then reversing the position of the ring in theband 84 to file the opposite side thereof. a ,9

Attached to the stud s3 is one end of a flexible metal band 84 thatencircles the periphery of the ring 20 and has its other end attached toa spiral drum 85 by a screw 86 in its periphery.

As shown in Figure 10, this spiral drum is ro- I50 tatable about a wingscrew 87 that passes downwardly through the latter, and a spur gear 88integral with its lower face, to a threaded hole in the plate 59.Meshing with the gear 88 is another gear 89 rotatable with a stud 90,journalled in the plate 59 and extending upwardly therefrom.

Attached to the top face of the gear 89 is a graduated disc 91,co-acting with a gage 92 secured to the plate 59. The upper end of thestud 90 is provided with a square shank 93 to receive thereon a crank 94by which the spiral drum may be rotated when the screw 87 is loosened.

When a split ring is applied to the face of the plate 59, the band 84 isloosened and the ring inserted within it, with its adjacent end on eachside of the filing disc. The spiral drum is now rotated by the crank 94,winding the band 84 about its periphery until the latter firmly gripsthe ring 20, whereupon the screw 87 is tightened to hold the band in itsproper contact with the ring. (See Figure 12.)

Because of the spiral contour of the drum, its periphery is constantlyprojected toward the ring when smaller ones are inserted, thus insuringa maximum contact of the band 84 with the periphery of the ring. Whenthe crank and graduated disc 91 are rotated to the desired tension, arecord may be made of the setting relative to the gage 92, so thatseveral rings may be filed to exactness.

When square cuts are filed, the adjusting block is lowered as shown atFigure 11, and when oblique cuts are to be filed the adjusting block israised and the swivel block rotated as shown in Figure 12. When sorotated, the curved block 63 will contact a stop pin 95, above the stud64, and projecting inwardly from the block 67.

With either of the ring filing devices that I have described it ispossible to quickly and accurately file the adjacent faces of the ringends to exact parallelism. This is not possible in ordinary operationswith a hand file, as commonly done. When a ring filed with my devices isfitted to an object, such as a piston or sliding valve, a perfect sealis effected by the true contact of the split ring faces.

While I have disclosed my device as constructed of cast iron and steelparts, I do not wish to be limited to that specific structure sincemetal stampings may be substituted to accomplish the same result.

Having described my invention, I claim:

1. In a device of the type described, a base member, a filing discjournaled in said base member, means for rotating said disc, a channelclamping block formed with a slot to receive said disc, for attachmentto said base member, a clamping bar laterally adjustable in said channelmember to receive between it and the outer wall of the channel block asplit ring to present the free ends of the latter to said filing disc,graduations on said clamping bar, and a pair of gage seats adjustableover the graduated clamping bar to center said ring over the filingdisc.

2. In a device of the type described, a base member, a filing discjournaled in said base member, means for rotating said disc, a channelclamping block formed with a slot to receive said disc, for attachmentto said base member, a clamping bar laterally adjustable in said channelmember to receive between it and the outer wall of the channel block asplit ring to present the free ends of the latter to said filing disc,graduations on said clamping bar, a pair of slotted, flanged platesslidable over said clamping block, and beveled seat extensions on saidplates, that project over said graduations, to receive and center thesplit ring over the filing disc.

3. In a device of the type described, a base member, a filing discjournaled in said base member, means for rotating said disc, a clampingblock formed with a quadrant shaped slot to receive said disc, the basemember formed with large holes, and small holes, arranged in pairs, pinson said clamping block for entrance into the small holes and a set screwcarried by said block for entrance into a large hole, to hold said blockin difierent angular positions on the base member, and means forclamping in said block a split ring to present its adjacent free ends ina desired angular position to the filing disc.

4. In a device of the type described, a base member, a filing discjournaled in said base member, means for rotating said disc, a channelclamping block formed with a quadrant shaped slot to receive said disc,and means for attaching said block in difierent angular positions to thebase member, the bottom of said channel block being beveled from eachend down to the edges of the quadrant-shaped slot to support a splitring in a position to present its free ends to the filing disc whichprojects upwardly through the slot.

CLIFFORD E. STORER.

